The video is over 10 minutes long and outlines both the discovery of the "EJB" menu — named after Mortal Kombat creator Ed "J" Boon — and how to access it.

The hidden EJB menu allows players to see characters' endings without having to beat the game, enter your initials onto the leaderboard, run diagnostic tools, and carry out something called "coin bookkeeping."

None of these are particularly revelatory, but the fact that they've remained hidden in plain sight for decades proves that there are still secrets yet to be revealed in some of the most well-loved video games of all time.